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Merkel Cell Polyomavirus Infection and Detection
Published on: February 7, 2019
Merkel cell carcinoma in a cat.
1Department of Pathology, Setsunan University, Osaka, Japan. ozaki@pharm.setsunan.ac.jp
The Journal of Veterinary Medical Science
|September 2, 2009
Summary
This study details a rare feline Merkel cell carcinoma case in a cat. Cytokeratin 20 positivity proved beneficial for diagnosing this unique cutaneous tumor.
Area of Science:
- Veterinary Pathology
- Oncology
- Dermatology
Background:
- Merkel cell carcinoma (MCC) is a rare neuroendocrine skin cancer in humans.
- Feline MCC is exceptionally uncommon, making diagnosis challenging.
- This report focuses on a specific case to improve diagnostic understanding.
Observation:
- A solitary cutaneous mass was identified on a 17-year-old domestic cat.
- Histopathology revealed round tumor cells infiltrating dermal and subcutaneous tissues.
- Tumor cells exhibited solid, trabecular, and cord-like proliferation patterns.
Findings:
- Tumor cells were immunopositive for cytokeratin 20 and synaptophysin.
- Cytokeratin 20 staining showed a localized to diffuse pattern.
- This is the first report highlighting cytokeratin 20's diagnostic utility in feline MCC.
Implications:
- Cytokeratin 20 is a valuable marker for diagnosing feline Merkel cell carcinoma.
- Enhanced understanding of feline MCC aids in accurate veterinary cancer diagnosis.
- This case contributes to the differential diagnosis of feline skin tumors.
